They didn't change anything about the combat during this maintenance, OP, unless it was a stealth change.
The only thing stated in the patch notes that they did was:"Improved service to reduce the number of player disconnections to the character selection screen."

The change you're most likely experiencing was in patch 1.1.0b, which was implemented on the 24th:"Significantly improved the delay when activating player abilities, particularly when in lower framerate situations. This allows for improved ability responsiveness in hectic combat situations"

No changes were announced this maintanence. Doesn't necessarily mean nothing happened, but I doubt it.

"I'll tell you something, my Tenchi, you know the carnival comes and goes. But if you wait for a while, it'll always come back to you, Tenchi."~Ryoko TENCHIxRYOKO FTW!

"The crystal is the heart of the blade. The heart is the crystal of the Jedi. The Jedi is the crystal of the Force.
The Force is the blade of the heart. All are intertwined. The crystal, the blade, the Jedi. You are one.